diff --git a/app/Entities/Equipment/ServerEntity.php b/app/Entities/Equipment/ServerEntity.php
index 03c0cf7..39095fd 100644
--- a/app/Entities/Equipment/ServerEntity.php
+++ b/app/Entities/Equipment/ServerEntity.php
@@ -81,7 +81,8 @@ class ServerEntity extends EquipmentEntity
     }
     public function getIP(): ?string
     {
-        return $this->ip ?? null;
+        $val = $this->ip ?? null;
+        return ($val === '' || $val === null) ? null : $val;
     }
 
     public function getViewer(): ?string
@@ -103,6 +104,7 @@ class ServerEntity extends EquipmentEntity
     }
     public function getFormatAt(): ?string
     {
-        return $this->format_at ?? null;
+        $val = $this->format_at ?? null;
+        return ($val === '' || $val === null) ? null : $val;
     }
 }
diff --git a/app/Services/Equipment/ServerService.php b/app/Services/Equipment/ServerService.php
index 5a7e51e..98f4f33 100644
--- a/app/Services/Equipment/ServerService.php
+++ b/app/Services/Equipment/ServerService.php
@@ -167,7 +167,7 @@ class ServerService extends EquipmentService
             //기존 IP 제거
             service('part_ipservice')->detachFromServer($oldEntity);
             //새로운 IP 추가 (IP가 정의 되어 있으면)
-            if ($entity->getIP()) {
+            if ($entity->getIP() !== null) {
                 service('part_ipservice')->attachToServer($entity);
             }
         }
@@ -175,7 +175,7 @@ class ServerService extends EquipmentService
         if ($oldEntity->getSwitchInfoUid() !== $entity->getSwitchInfoUid()) {
             service('part_switchservice')->detachFromServer($oldEntity);
             //새로운 Switch 추가 (Switch가 정의 되어 있으면)
-            if ($entity->getSwitchInfoUid()) {
+            if ($entity->getSwitchInfoUid() !== null) {
                 service('part_switchservice')->attachToServer($entity);
             }
         }
@@ -183,7 +183,7 @@ class ServerService extends EquipmentService
         if ($oldEntity->getChassisInfoUid() !== $entity->getChassisInfoUid()) {
             service('equipment_chassisservice')->detachFromServer($oldEntity);
             //새로운 Chassis 추가 (Chassis가 정의 되어 있으면)
-            if ($entity->getChassisInfoUid()) {
+            if ($entity->getChassisInfoUid() !== null) {
                 service('equipment_chassisservice')->attachToServer($entity);
             }
         }